Higher Plus
23rd February 1975
- 1Histograms2 marks
On a histogram, a 4-wide bar and a 8-wide bar have the same frequency density of 2.5. How many more values are in the wider class?
- 2Bounds3 marks
x = 99 and y = 38, each correct to the nearest whole number. Work out the upper bound of x - y.
- 3The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 11, 22, 37, 56, ...
- 4Velocity Time Graphs3 marks
A tram runs at 17 m/s for 10 s, then slows steadily to rest over 4 s. Work out its average speed for the whole journey, to 2 decimal places.
- 5Vectors Proof Questions3 marks
In a vector proof you find that vector PQ = 2a + 6b and vector RS = 4a + 12b. What does this show about PQ and RS?
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